thanks for the replies
apart from the usual small amount of condensation on start up the motor doesn't smoke atall. i can smell coolant in the cab when im driving, not bad too much, just when i stop at a set of lights or something.
ive checked all the hoses and the only one i cant get to but looks a little rotten is the one metal pipe which runs under the exhaust manifold.
i cant smell coolant in the exhaust, and i dont get condensation on my hand when i hold it there for a while.
when i bought the truck the guy said his son had overheated it and cracked the block..
the rate its going through coolant would make me think that it would be smoking like hell and overheating, aswell as mayo in the filler cap.. its doing none of these..